Story Highlights

Singer-songwriter Fiona Apple will not put her career ahead of love and friendship.

Apple, who made headlines in September after being booked on drug charges in West Texas, has postponed the South American leg of her tour to take care of her dog, Janet, who has Addison's Disease.

Apple's next tour leg was set to pick up next week in Porto Alegre, Brazil.

The singer, whose message appears to have been written a few days ago but was just posted on her Facebook page today, addresses "a few thousand friends I have not met yet" in her post.

Apple goes on to talk about her 14-year-old pitbull, which she has had since the pup was less than a year old.

The singer writes: "Janet has been the most consistent relationship of my adult life, and that is just a fact."

Apple goes on: "She has Addison's Disease, which makes it dangerous for her to travel since she needs regular injections of Cortisol, because she reacts to stress and to excitement without the physiological tools which keep most of us from literally panicking to death.

"Despite all of this, she's effortlessly joyful and playful, and only stopped acting like a puppy about 3 years ago."

Janet no longer wants to go for walks, so Apple writes that the "decision is instant" to stay with her friend rather than go on tour.

She goes on to explain, "I just can't leave her now, please understand.

"If I go away again, I'm afraid she'll die and I won't have the honor of singing her to sleep, of escorting her out."